On Oct 24, 2006, at 11:10 PM, Fernando Aires wrote:
>
> Hello,
>
> I have a previously instantiated widget (particularly a
> SingleSelectField), and need to change one of its parameters
> (particularly the options attribute). To do it straightly generates an
> exception.
> I found at the list archives one patch from last January, from
> Michele Celia, proposing a change. However, there's any other way of
> doing so, without redefining the widget?
>
> Sincerely,
Changing the parameter on the widget is not possible, nor desirable,
it wouln't be thread-safe because widget instances are shared among
threads.
However, you can override most parameters on a per-request basis just
by passing them as keyword arguments to display:
${select_field.display(options=new_options)}
You can also initialize your select field passing a callable as the
options parameter which can return fresh options for each request:
def players():
return [(p.id, p.name) for p in Player.select()]
select_field = SingleSelectField("goalie", options=players)
Alberto
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